ocs_doc_api: update docs + fix review-drift findings

- lib.rs: export all 14 facade handles (add ArcCurve/Ellipse/Spline/Ray/XLine/Text/
  MText/Dimension + Circle) — public surface matches collection return types.
- build.rs: fix step-1 comment (enums are hand-maintained, not 'regenerated');
  generic_reference_md: Clone (not Copy) + full 14-handle list (was stale 6).
- ops.rs/query.rs: correct 'hand-maintained' module doc comments (were 'GENERATED').
- layouts.json: extend to all 22 Operation + 12 Query variants (was stale phase-1).
- binding_schema.json regenerated (complete layouts + derived handles).
- generate.py: inject 'id': self.id for SetTextContent/SetAttribute/SetViewportView/
  Transform/Delete/AddVertex (was malformed id-less payloads); _apply_op/_apply_query
  accept want=None; extend PY_TYPES (String/&str/Vec returns/new handles).
- README.md: Clone (not Copy) + full scope (2D curves, annotations, containers,
  viewports, media) replacing stale 'Not yet' list.
- Plan (.kilo): mark implemented & published; pointer to live crate docs.

crates/ocs_doc_api/build.rs

@@ -110,9 +110,10 @@ fn main() {
     let gen_dir = manifest_dir.join("src/gen");
     fs::create_dir_all(&gen_dir).unwrap();
 
-    // 1. Regenerate the ops/query enum snapshots (deterministic; these are the
-    //    curated v1 variants — the spec drives docs/schema, the enums are the
-    //    stable wire vocabulary appended at end only).
+    // 1. Emit the HAND-MAINTAINED ops/query enum snapshots verbatim. The enums are
+    //    NOT derived from the spec here — they are the canonical append-only wire
+    //    vocabulary; the spec's `op`/`query` names must map to variants (asserted
+    //    by a test). `write_if_changed` is effectively a no-op round-trip.
     write_if_changed(&gen_dir.join("ops_gen.rs"), &ops_gen_src());
     write_if_changed(&gen_dir.join("query_gen.rs"), &query_gen_src());
 
@@ -149,8 +150,9 @@ fn fmt_args(args: &[Arg]) -> String {
 fn generic_reference_md() -> String {
     r#"## Generic methods (every handle)
 
-Every typed handle (`Solid`, `Line`, `Circle`, `Polyline`, `Point`, `Entity`) is a
-`Copy`, `Send`, `Sync` token `{ ObjectId, session }` and supports:
+Every typed handle (`Solid`, `Line`, `Circle`, `Polyline`, `Point`, `ArcCurve`,
+`Ellipse`, `Spline`, `Ray`, `XLine`, `Text`, `MText`, `Dimension`, `Entity`) is a
+`Clone`, `Send`, `Sync` token `{ ObjectId, session }` and supports:
 
 - **`id()` -> `ObjectId`** — the stable entity identity.
 - **`bounds()` -> `Aabb`** — coarse bounding box (solids lift-on-miss; 2D entities